Well, for hamburger hill you only need some weasels and tigers against the ghorkovs, because they won't do that much. The real treat are the taerkastens. You will have to make weasels, foxes and falcons, which you should take control of, so you can defeat the planes. For the leonids you will need so...

Hamburger hill is one of the just "slaugther all of them" missions, which means i just go rage mode and shoot everyone i see, which kinda helps for me ^^. Sibuna is easy. Just kill the ghorkovs by killing their PS with the new double shot falcon and then kill the BS by just go with 25 dragonflys 50 ...